Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4f6e38111af53c…

MALICIOUS

PDF

68.0 KB Created: 2020-12-24 04:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2b3656850aed2c531342f99026a8ba3e SHA-1: e76aa51cadf4bc1a5173d28fc7e8ef44815b090a SHA-256: 5f4f6e38111af53c08b772c627df78b6a47b0f42bd2d4d8742fc607b090bd4de
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, specifically targeting users with a "Zara black friday 2020 uk" lure. The document's structure and numerous links to disposable hosting services indicate a phishing or scam attempt. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/strik?utm_term=zara+black+friday+2020+uk In PDF document text
    • https://cdn.sqhk.co/donewipimep/L0KxjgV/nuvexoxikitilozifapu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fe38a2fdca0e.pdfIn PDF document text
    • https://bavamelamasol.weebly.com/uploads/1/3/4/7/134714994/tisonulogujunowel.pdfIn PDF document text
    • https://bobenetawif.weebly.com/uploads/1/3/4/6/134666578/masowujewani_vanakunoso_fapiwiri_wamevidexubew.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/cibMigh/tilusoxisosefid.pdfIn PDF document text
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/vatilugenizepo.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/2507513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca80d965-c1d3-417b-afea-27da83b61933/98630267350.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/tewitig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/209531f7-18bf-4217-a85f-cca04b65d141/gezonebu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCE 5372 bytes
SHA-256: 3bca1fa60b01f9065fb20d9d3c3dc6ddb8624b751f33c7c75f0cf0f714da3a61
font_01_sfnt_off0000df38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF38 10656 bytes
SHA-256: 32df1ee434b6016822db7696a755fc239e372beff5ceabfd25a54036172e2b88

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